Uncertainty

Which of these is NOT true for systematic errors?

• They arise due to errors in the measuring instruments used.

• Repeating the observations or increasing the sample size can eliminate them

• They are reproducible inaccuracies that are consistently in the same direction.

• They arise from the design of the study.

Which of these is NOT true for random errors?

• They are difficult to detect.

• They do not arise from the design of the study.

• They are less likely for small sample sizes.

Systematic errors lead to a lack of:

• accuracy in the measurement.

• significant digits in the measurement.

• precision in the measurement.

• gradation of the measuring instrument

Random errors lead to a lack of:

• accuracy in the measurement.

• significant digits in the measurement.

• precision in the measurement.

• gradation of the measuring instrument

Repeated measurements of a quantity can reduce the effects of

• both random errors and systematic errors

• neither random errors nor random errors

• random errors

• systematic errors

How close a measurement is to the true value is called..

• Accuracy

• Precision

• Significant

• Estimate

This bullseye demonstrates...

• High Accuracy & High Precision

• High Accuracy & Low Precision

• Low Accuracy & High Precision

• Low Accuracy & Low Precision

length?

• 3.2 cm

• 3.12 cm

• 3 cm

• 3.219 cm

The metal is 7.1 cm long

• 7 is the estimated digit

• 1 is the estimated digit

• 7 is the uncertain digit

• Both 7 and 1 are estimated digits

You place a rock on the electronic balance an it measures a mass of 12.38 g. The estimated digit is....

• 1

• 2

• 3

• 8